OpenStax Microbiology Test Bank
Chapter 4: Prokaryotic Diversity
Chapter 4: Prokaryotic Diversity
Correct answer Multiple Choice
1. Which is the best example of a population?
A. all the microbes living in a particular area
B. all the microbes of a particular domain living in a particular area
C. all the microbes of a single species living in a particular area
D. all the microbes living within the same host
Difficulty: Moderate ASM Standard: 20
2. Microbial ecology is defined as the study of which of the following?
A. competitive interactions between microbes
B. cooperative interactions between microbes
C. interactions between individuals of a single species
D. interactions between microbial populations and their environment
Difficulty: Easy
ASM Standard: 20
3. Which term best describes the relationship between pathogenic bacteria and humans?
A. amensalism
B. commensalism
C. parasitism
D. predation
Difficulty: Moderate ASM Standard: 23
4. Which of the following is not a class within the phylum Proteobacteria?
A. Alphaproteobacteria
B. Betaproteobacteria
C. Deltaproteobacteria
D. Omegaproteobacteria
Difficulty: Easy ASM Standard: N/A
5. Which of the following correctly characterizes Epsilonproteobacteria?
A. They are atypical (not gram positive or gram negative).
B. They are gram negative.
C. They are gram positive.
D. They are gram variable.
Difficulty: Easy ASM Standard: 34
6. Which describes bacteria that require low concentrations of oxygen to survive (less than that in the current atmosphere)?
A. facultative anaerobes
B. microaerophiles
C. obligate aerobes
D. obligate anaerobes
Difficulty: Easy
ASM Standard: 11, 22
7. Cyanobacteria produce which of the following?
A. hydrogen sulfide gas
B. large quantities of ammonia
C. oxygen
D. sulfuric acid
Difficulty: Easy
ASM Standard: 11, 22
8. Which of the following bacterial groups is thought to be most closely related to the last universal common ancestor?
A. Alphaproteobacteria
B. cyanobacteria
C. deeply branching bacteria
D. green filamentous bacteria
Difficulty: Easy ASM Standard: 5
9. Which of the following is a phylum in Domain Archaea?
A. Crenarchaeotae
B. Deinococcus
C. Mycoplasma
D. Thermotogae
Difficulty: Easy ASM Standard: 5
10. Which genus contains the nitrogen-fixing bacteria that live in legume nodules?
A. Bacillus
B. Escherichia
C. Rhizobium
D. Vibrio
Difficulty: Moderate ASM Standard: 11
, 24
11. Approximately what percentage of prokaryotes are thought to be pathogens?
A. <1%
B. 12%
C. 26%
D. 48%
Difficulty: Moderate ASM Standard: 23
12. Two species of bacteria live in near each other and use similar food resources. Which type of biological interaction does this describe?
A. a competitive interaction
B. a cooperative interaction
C. a mutualistic interaction
D. a parasitic interaction
Difficulty: Moderate ASM Standard: 23
13. Which of the following is a source of vitamin K for humans?
A. Bacteroides thetaiotetraiotamicron digests foods, which release vitamin K.
B. Escherichia coli in their digestive tract produces vitamin K.
C. S. epidermidis releases vitamin K from dead cells.
D. their diet only
Difficulty: Moderate ASM Standard: 23, 24
14. The human microbiome consists of which of the following?
A. all microbes present on or in the body
B. pathogenic microbes only
C. resident microbes only
D. transient microbes only
Difficulty: Moderate ASM Standard: 23
15. The most common bacterial genus found in plaque on teeth is which of the following?
A. Fusobacterium
B. Haemophilus
C. Lactobacillus
D. Streptococcus
Difficulty: Moderate ASM Standard: 23
16. Who authored A Manual in Determinative Bacteriology, published in 1923?
A. David Bergey
B. Robert Koch
C. Barry Marshall and Robin Warren
D. Louis Pasteur
Difficulty: Moderate ASM Standard: N/A
17. Which of the following cannot be classified as either gram positive or gram negative on the basis of the Gram staining protocol?
A. Bacillus
B. Escherichia
C. Mycoplasma
D. Vibrio
Difficulty: Moderate ASM Standard: N/A
18. Bordetella pertussis is an example of which group of organisms?
A. Cytophaga-Flavobacterium-Bacteroides
B. high G+C bacteria
C. Proteobacteria
D. spirochetes
Difficulty: Moderate ASM Standard: N/A
19. Treponema pallidum, the causative agent of syphilis, is an example of which group of organisms?
A. CFB group
B. planctomycetes
C. proteobacteria
D. spirochetes
Difficulty: Moderate ASM Standard: N/A
20. Which of the following correctly describes the microscopic morphology of Bacteroides?
A. gram-negative bacilli
B. gram-negative cocci
C. gram-positive bacilli
D. gram-positive cocci
Difficulty: Moderate ASM Standard: N/A
21. Which best describes the metabolic activities of purple sulfur bacteria?
A. They are capable of nitrogen fixation, fixing nitrogen gas into nitrates and ammonia.
B. They are heterotrophic and break down organic compounds to obtain energy.
C. They use light energy to oxidize hydrogen sulfide, producing sulfur and sulfuric acid.
D. They use light energy to oxidize organic compounds such as sugars.
Difficulty: Moderate ASM Standard: 11
22. How do Archaea differ from Bacteria?
A. Archaea
are found exclusively in extreme habitats.
B. Archaea have ether linkages in their cell membranes.
C. Archaea have peptidoglycan cell walls.
D. Archaea lack a nucleus.
Difficulty: Moderate ASM Standard: 8
23. Which of the following correctly describes the metabolism of methanogens?
A. They oxidize CO2.
B. They oxidize H2S.
C. They produce CH4.
D. They produce N2 gas.
Difficulty: Moderate ASM Standard: 11
24. Which best describes Halobacterium salinarum?
A. It is a type of methanogen.
B. It is abundant in temperate environments.
C. It is an example of the deeply branching bacteria.
D. It is one of the oldest archaea.
Difficulty: Moderate ASM Standard: 5
25. Which of the following is the correct classification for the methanogens?
A. Archaea
B. low G+C bacteria
C. Proteobacteria
D. spirochetes
Difficulty: Moderate ASM Standard: 11
26. Which best describes Crenarchaeota?
A. aquatic archaea abundant in oceans
B. aquatic bacteria abundant in oceans
C. archaea that cause dental disease
D. pathogenic bacteria that infect animals
Difficulty: Moderate ASM Standard: 11
27. The LPSN refers to which of the following?
A. a guide to bacterial identification
B. a list of approved bacterial names
C. a taxonomic key to aid identification of bacteria
D. an overview of current bacterial systematics
Difficulty: Difficult
ASM Standard: N/A
28. Which of the following is not a genus of Betaproteobacteria?
A. Bordetella
B. Chlamydia
C. Leptothrix
D. Thiobacillus
Difficulty: Difficult ASM Standard: N/A
29. Which of the following bacterial genera is microaerophilic?
A. Bdellovibrio
B. Campylobacter
C. Klebsiella
D. Pseudomonas
Difficulty: Difficult
ASM Standard: 11, 20, 22
30. Rhodospirillum, a genus capable of fixing nitrogen, is a type of which of the following?
A. green nonsulfur bacteria
B. green sulfur bacteria
C. purple nonsulfur bacteria
D. purple sulfur bacteria
Difficulty: Difficult ASM Standard: 11
31. Which genus, believed to be the deepest-branching archaeal genus, has flagella and is strictly anaerobic?
A. Methanosarcina
B. Pyrolobus
C. Sulfolobus
D. Thermoproteus
Difficulty: Difficult ASM Standard: 5, 20
32. Which best describes the class Halobacteria?
A. archaeans that require highly saline environments
B. archaeans that require methane-rich environments
C. bacteria that require highly arid environments
D. bacteria that require highly saline environments
Difficulty: Difficult ASM Standard: 20
33. Methanobrevibacter oralis is an example of which type of organism?
A. a bacterium that takes advantage of the conditions caused by immunosuppression, as can occur during cancer treatment
B. a pathogenic archaean
C. a pathogenic bacterium
D. an archaean that takes advantage of the conditions caused by periodontal disease to grow; may or may not affect disease progression
Difficulty: Difficult ASM Standard: 23
34. A toga is which of the following?
A. a structure produced by the fungus Tolypocladium inflatum that has medicinal uses
B. an outer membrane found in a taxon within the deeply branching bacteria
C. an outer peptidoglycan layer found in a taxon within the proteobacteria
D. an unusual cell wall found in some archaeans
Difficulty: Difficult ASM Standard: 8
TO BE CONTINUED(35 TO 79)…………..
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